Units responding to manual stretch of single eye muscles were localized in the mesodiencephalic region of the lamb. Responses of the type induced by muscle spindle excitation were recorded from ipsilateral medial lemniscus, tegmentum and tectum of both colliculi and from ipsilateral posteroventrolateral nuclei of the thalamus. From the same mesodiencephalic points activated by stretch of individual eye muscles typical evoked potentials could be recorded following single-shock electrical stimulation...
Cells responsive to stretching individual eye muscles were identified electrophysiologically in the medial dorso-lateral part of the semilunar ganglion of the Lamb. The destruction of such a cellular pool was followed by degeneration of some spindles in those eye muscles whose stretch had elicited responses of the gasserian cells and of some nervous fibers in the ophthalmic branch, in the sensory trigeminal root and in the ipsilateral descending trigeminal tract. The degenerations ended in the pars...
Aim of this research was to investigate the effects of acute, mid-line and symmetrical split carried out at different levels of the brain on the ocular nystagmus brought about in the guinea pig by low-frequency electrical stimulation of the temporo-parietal cortex or of the nystagmogenic fibers running in the superior colliculus and by thermal stimulation of the labyrinth. Mid-line split: i) of the corpus callosum and of diencephalon, ii) of the mesencephalon and iii) of the most rostral part of...
The masseteric reflex elicited by electrical stimulation of the mesencephalic trigeminal nucleus (MTN) was influenced by electrical stimulation of the central stump of the vagal nerve and of the reticular formation in the duck; the vagal nerve exerted predominantly inhibition while the reticular formation could inhibit or enhance the jaw reflex movements: increase was the most common effect. Unitary discharge of the MTN was recorded in curarized ducks by means of tungsten microelectrodes. Units...
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